Submission #58691449

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Source Code Expand

#include <bits/stdc++.h>
#define int long long
using namespace std;
inline int read()
{
	int w=1,s=0;char ch=getchar();
	while(!isdigit(ch)){if(ch=='-')w=-1;ch=getchar();}
	while(isdigit(ch)){s=s*10+(ch-'0');ch=getchar();}
	return w*s;
}
const int maxn=1e6+100;
const int mod=1e9+7;
const int inf=1e10+7;   
int n,ans=0;
char s[maxn];
int sum[2][maxn][30];
signed main()
{
#ifdef Lydic
	freopen(".in","r",stdin);
	freopen(".out","w",stdout);
//  #else   
//   	freopen("city.in","r",stdin);
//   	freopen("city.out","w",stdout);
#endif
    scanf("%s",s+1);
    n=strlen(s+1);
    for(int i=1;i<=n;i++)
    {
        for(int j=0;j<26;j++)
        {
            sum[0][i][j]=sum[0][i-1][j]+(s[i]-'A'==j);
        }
    }
    for(int i=n;i>=1;i--)
    {
        for(int j=0;j<26;j++)
        {
            sum[1][i][j]=sum[1][i+1][j]+(s[i]-'A'==j);
        }
    }
    for(int i=1;i<=n;i++)
    {
        if(i==1||i==n)continue;
        for(int j=0;j<26;j++)
        {
            ans=ans+sum[0][i-1][j]*sum[1][i+1][j];
        }
    }
    cout<<ans;
	return 0;
}

Submission Info

Compile Error

Main.cpp: In function ‘int main()’:
Main.cpp:26:10: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   26 |     scanf("%s",s+1);
      |     ~~~~~^~~~~~~~~~

Judge Result